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out_es: custom http headers #9416

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216a70b
out_es: custom added ability ot set custom HTTP headers
AndrewChubatiuk Sep 24, 2024
4653a2d
Merge branch 'master' into out-es-custom-http-headers
AndrewChubatiuk Sep 30, 2025
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22 changes: 22 additions & 0 deletions plugins/out_es/es.c
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Original file line number Diff line number Diff line change
Expand Up @@ -825,6 +825,10 @@ static void cb_es_flush(struct flb_event_chunk *event_chunk,
struct flb_http_client *c;
flb_sds_t signature = NULL;
int compressed = FLB_FALSE;
struct mk_list *head;
struct flb_config_map_val *mv;
struct flb_slist_entry *key = NULL;
struct flb_slist_entry *val = NULL;
flb_sds_t header_line = NULL;

/* Get upstream connection */
Expand Down Expand Up @@ -883,6 +887,16 @@ static void cb_es_flush(struct flb_event_chunk *event_chunk,

flb_http_add_header(c, "Content-Type", 12, "application/x-ndjson", 20);

/* Arbitrary additional headers */
flb_config_map_foreach(head, mv, ctx->headers) {
key = mk_list_entry_first(mv->val.list, struct flb_slist_entry, _head);
val = mk_list_entry_last(mv->val.list, struct flb_slist_entry, _head);

flb_http_add_header(c,
key->str, flb_sds_len(key->str),
val->str, flb_sds_len(val->str));
}

if (ctx->http_user && ctx->http_passwd) {
flb_http_basic_auth(c, ctx->http_user, ctx->http_passwd);
}
Expand Down Expand Up @@ -1126,6 +1140,14 @@ static struct flb_config_map config_map[] = {
"Base-64 encoded API key credential for Elasticsearch"
},

/* Arbitrary HTTP headers */
{
FLB_CONFIG_MAP_SLIST_1, "header", NULL,
FLB_CONFIG_MAP_MULT, FLB_TRUE, offsetof(struct flb_elasticsearch, headers),
"Add a HTTP header key/value pair. Multiple headers can be set"
},


/* HTTP Compression */
{
FLB_CONFIG_MAP_STR, "compress", NULL,
Expand Down
3 changes: 3 additions & 0 deletions plugins/out_es/es.h
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,9 @@ struct flb_elasticsearch {
char *type;
int suppress_type_name;

/* Arbitrary HTTP headers */
struct mk_list *headers;

/* HTTP Auth */
char *http_user;
char *http_passwd;
Expand Down
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